\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( hscMain ) where
+module HscMain ( HscResult(..), hscMain,
+#ifdef GHCI
+ hscExpr,
+#endif
+ initPersistentCompilerState ) where
#include "HsVersions.h"
-import IO ( hPutStr, stderr )
+#ifdef GHCI
+import RdrHsSyn ( RdrNameHsExpr )
+import Rename ( renameExpr )
+import CoreToStg ( coreExprToStg )
+import StringBuffer ( stringToStringBuffer, freeStringBuffer )
+import Unique ( Uniquable(..) )
+import Type ( splitTyConApp_maybe )
+import PrelNames ( ioTyConKey )
+import ByteCodeGen ( byteCodeGen )
+#endif
+
import HsSyn
-import RdrHsSyn ( RdrNameHsModule )
-import FastString ( unpackFS )
import StringBuffer ( hGetStringBuffer )
-import Parser ( parse )
+import Parser
import Lex ( PState(..), ParseResult(..) )
import SrcLoc ( mkSrcLoc )
-
-import Rename ( renameModule )
-
-import PrelInfo ( wiredInThings )
-import PrelRules ( builtinRules )
-import MkIface ( writeIface )
-import TcModule ( TcResults(..), typecheckModule )
-import Desugar ( deSugar )
-import SimplCore ( core2core )
-import OccurAnal ( occurAnalyseBinds )
+import Rename ( checkOldIface, renameModule, closeIfaceDecls )
+import Rules ( emptyRuleBase )
+import PrelInfo ( wiredInThingEnv, wiredInThings )
+import PrelNames ( knownKeyNames )
+import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
+ writeIface, pprIface )
+import TcModule
+import InstEnv ( emptyInstEnv )
+import Desugar
+import SimplCore
import CoreUtils ( coreBindsSize )
import CoreTidy ( tidyCorePgm )
-import CoreToStg ( topCoreBindsToStg )
-import StgSyn ( collectFinalStgBinders )
+import CoreSat
+import CoreToStg ( coreToStg )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleNameUserString )
+import Module ( ModuleName, moduleName, mkHomeModule )
import CmdLineOpts
-import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
+import ErrUtils ( dumpIfSet_dyn, showPass )
+import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
+import Bag ( emptyBag )
import Outputable
-import Char ( isSpace )
-import StgInterp ( runStgI )
+import Interpreter
+import CmStaticInfo ( GhciMode(..) )
import HscStats ( ppSourceStats )
+import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..),
+ PersistentRenamerState(..), ModuleLocation(..),
+ HomeSymbolTable,
+ OrigNameEnv(..), PackageRuleBase, HomeIfaceTable,
+ typeEnvClasses, typeEnvTyCons, emptyIfaceTable )
+import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
+import OccName ( OccName )
+import Name ( Name, nameModule, nameOccName, getName )
+import Name ( emptyNameEnv )
+import Module ( Module, lookupModuleEnvByName )
+
+import Monad ( when )
+import Maybe ( isJust )
+import IO
\end{code}
\begin{code}
data HscResult
- = HscOK ModDetails -- new details (HomeSymbolTable additions)
- (Maybe ModIface) -- new iface (if any compilation was done)
- (Maybe String) -- generated stub_h filename (in /tmp)
- (Maybe String) -- generated stub_c filename (in /tmp)
- (Maybe [UnlinkedIBind]) -- interpreted code, if any
- PersistentCompilerState -- updated PCS
- (Bag WarnMsg) -- warnings
-
- | HscErrs PersistentCompilerState -- updated PCS
- (Bag ErrMsg) -- errors
- (Bag WarnMsg) -- warnings
+ -- compilation failed
+ = HscFail PersistentCompilerState -- updated PCS
+ -- concluded that it wasn't necessary
+ | HscNoRecomp PersistentCompilerState -- updated PCS
+ ModDetails -- new details (HomeSymbolTable additions)
+ ModIface -- new iface (if any compilation was done)
+ -- did recompilation
+ | HscRecomp PersistentCompilerState -- updated PCS
+ ModDetails -- new details (HomeSymbolTable additions)
+ ModIface -- new iface (if any compilation was done)
+ (Maybe String) -- generated stub_h filename (in /tmp)
+ (Maybe String) -- generated stub_c filename (in /tmp)
+ (Maybe ([UnlinkedIBind],ItblEnv)) -- interpreted code, if any
+
+
+ -- no errors or warnings; the individual passes
+ -- (parse/rename/typecheck) print messages themselves
hscMain
- :: DynFlags
- -> ModSummary -- summary, including source filename
- -> Maybe ModIFace -- old interface, if available
- -> String -- file in which to put the output (.s, .hc, .java etc.)
+ :: GhciMode
+ -> DynFlags
+ -> Bool -- source unchanged?
+ -> ModuleLocation -- location info
+ -> Maybe ModIface -- old interface, if available
-> HomeSymbolTable -- for home module ModDetails
+ -> HomeIfaceTable
-> PersistentCompilerState -- IN: persistent compiler state
-> IO HscResult
-hscMain dflags core_cmds stg_cmds summary maybe_old_iface
- output_filename mod_details pcs1
- = do
- source_unchanged :: Bool -- extracted from summary?
-
- (pcs2, check_errs, (recomp_reqd, maybe_checked_iface))
- <- checkOldIface dflags finder hit hst pcs1 mod source_unchanged
- maybe_old_iface
-
- -- test check_errs and give up if a problem happened
- what_next = if recomp_reqd then hscRecomp else hscNoRecomp
-
- return $
- what_next dflags core_cmds stg_cmds summary hit hst
- pcs2 maybe_checked_iface
-
-hscNoRecomp = panic "hscNoRecomp"
-
-hscRecomp dflags core_cmds stg_cmds summary hit hst pcs maybe_old_iface
- = do
- -- parsed :: RdrNameHsModule
- parsed <- parseModule summary
- -- check for parse errors
-
- (pcs_rn, maybe_rn_result)
- <- renameModule dflags finder hit hst pcs mod parsed
-
- -- check maybe_rn_result for failure
-
- (new_iface, rn_hs_decls) = unJust maybe_rn_result
-
- maybe_tc_result
- <- typecheckModule dflags mod pcs hst hit pit rn_hs_decls
-
- -- check maybe_tc_result for failure
- let tc_result = unJust maybe_tc_result
- let tc_pcs = tc_pcs tc_result
- let tc_env = tc_env tc_result
- let tc_binds = tc_binds tc_result
- let local_tycons = tc_tycons tc_result
- let local_classes = tc_classes tc_result
-
- -- desugar, simplify and tidy, to create the unfoldings
- -- why is this IO-typed?
- (tidy_binds, orphan_rules, fe_binders, h_code, c_code) -- return modDetails?
- <- dsThenSimplThenTidy dflags mod tc_result rule_base ds_uniqs
+hscMain ghci_mode dflags source_unchanged location maybe_old_iface hst hit pcs
+ = do {
+ showPass dflags ("Checking old interface for hs = "
+ ++ show (ml_hs_file location)
+ ++ ", hspp = " ++ show (ml_hspp_file location));
+
+ (pcs_ch, errs_found, (recomp_reqd, maybe_checked_iface))
+ <- checkOldIface ghci_mode dflags hit hst pcs
+ (unJust "hscMain" (ml_hi_file location))
+ source_unchanged maybe_old_iface;
+
+ if errs_found then
+ return (HscFail pcs_ch)
+ else do {
+
+ let no_old_iface = not (isJust maybe_checked_iface)
+ what_next | recomp_reqd || no_old_iface = hscRecomp
+ | otherwise = hscNoRecomp
+ ;
+ what_next ghci_mode dflags location maybe_checked_iface
+ hst hit pcs_ch
+ }}
+
+
+-- we definitely expect to have the old interface available
+hscNoRecomp ghci_mode dflags location (Just old_iface) hst hit pcs_ch
+ | ghci_mode == OneShot
+ = do {
+ hPutStrLn stderr "compilation IS NOT required";
+ let { bomb = panic "hscNoRecomp:OneShot" };
+ return (HscNoRecomp pcs_ch bomb bomb)
+ }
+ | otherwise
+ = do {
+ hPutStr stderr "compilation IS NOT required";
+ when (verbosity dflags /= 1) $ hPutStrLn stderr "";
+
+ -- CLOSURE
+ (pcs_cl, closure_errs, cl_hs_decls)
+ <- closeIfaceDecls dflags hit hst pcs_ch old_iface ;
+ if closure_errs then
+ return (HscFail pcs_cl)
+ else do {
+
+ -- TYPECHECK
+ maybe_tc_result <- typecheckModule dflags pcs_cl hst
+ old_iface alwaysQualify cl_hs_decls;
+ case maybe_tc_result of {
+ Nothing -> return (HscFail pcs_cl);
+ Just (pcs_tc, tc_result) -> do {
+
+ let env_tc = tc_env tc_result
+ local_rules = tc_rules tc_result
+ ;
+ -- create a new details from the closed, typechecked, old iface
+ let new_details = mkModDetailsFromIface env_tc local_rules
+ ;
+ return (HscNoRecomp pcs_tc new_details old_iface)
+ }}}}
+
+
+hscRecomp ghci_mode dflags location maybe_checked_iface hst hit pcs_ch
+ = do {
+ ; when (verbosity dflags >= 1) $
+ hPutStr stderr "compilation IS required";
+ -- mode -v1 tries to keep everything on one line
+ when (verbosity dflags > 1) $
+ hPutStrLn stderr "";
+
+ -- what target are we shooting for?
+ ; let toInterp = dopt_HscLang dflags == HscInterpreted
+
+ -------------------
+ -- PARSE
+ -------------------
+ ; maybe_parsed <- myParseModule dflags
+ (unJust "hscRecomp:hspp" (ml_hspp_file location))
+ ; case maybe_parsed of {
+ Nothing -> return (HscFail pcs_ch);
+ Just rdr_module -> do {
+ ; let this_mod = mkHomeModule (hsModuleName rdr_module)
+
+ -------------------
+ -- RENAME
+ -------------------
+ ; (pcs_rn, maybe_rn_result)
+ <- renameModule dflags hit hst pcs_ch this_mod rdr_module
+ ; case maybe_rn_result of {
+ Nothing -> return (HscFail pcs_rn);
+ Just (print_unqualified, (is_exported, new_iface, rn_hs_decls)) -> do {
+
+ -------------------
+ -- TYPECHECK
+ -------------------
+ ; maybe_tc_result <- typecheckModule dflags pcs_rn hst new_iface
+ print_unqualified rn_hs_decls
+ ; case maybe_tc_result of {
+ Nothing -> return (HscFail pcs_rn);
+ Just (pcs_tc, tc_result) -> do {
+
+ ; let env_tc = tc_env tc_result
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (ds_binds, ds_rules, foreign_stuff)
+ <- deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
+
+ -------------------
+ -- SIMPLIFY, TIDY-CORE
+ -------------------
+ -- We grab the the unfoldings at this point.
+ ; (pcs_simpl, tidy_binds, orphan_rules)
+ <- simplThenTidy dflags pcs_tc hst this_mod is_exported ds_binds ds_rules
+
+ -------------------
+ -- BUILD THE NEW ModDetails AND ModIface
+ -------------------
+ ; let new_details = mkModDetails env_tc tidy_binds orphan_rules
+ ; final_iface <- mkFinalIface ghci_mode dflags location
+ maybe_checked_iface new_iface new_details
+
+ -------------------
+ -- CONVERT TO STG
+ -------------------
+ ; (stg_binds, cost_centre_info)
+ <- myCoreToStg dflags this_mod tidy_binds
+
+ -------------------
+ -- COMPLETE CODE GENERATION
+ -------------------
+ ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_ibinds)
+ <- restOfCodeGeneration dflags toInterp this_mod
+ (map ideclName (hsModuleImports rdr_module))
+ cost_centre_info foreign_stuff env_tc stg_binds tidy_binds
+ hit (pcs_PIT pcs_simpl)
+
+ -- and the answer is ...
+ ; return (HscRecomp pcs_simpl new_details final_iface
+ maybe_stub_h_filename maybe_stub_c_filename
+ maybe_ibinds)
+ }}}}}}}
+
+
+
+mkFinalIface ghci_mode dflags location maybe_old_iface new_iface new_details
+ = case completeIface maybe_old_iface new_iface new_details of
+ (new_iface, Nothing) -- no change in the interfacfe
+ -> do when (dopt Opt_D_dump_hi_diffs dflags)
+ (printDump (text "INTERFACE UNCHANGED"))
+ dumpIfSet_dyn dflags Opt_D_dump_hi
+ "UNCHANGED FINAL INTERFACE" (pprIface new_iface)
+ return new_iface
+ (new_iface, Just sdoc_diffs)
+ -> do dumpIfSet_dyn dflags Opt_D_dump_hi_diffs "INTERFACE HAS CHANGED"
+ sdoc_diffs
+ dumpIfSet_dyn dflags Opt_D_dump_hi "NEW FINAL INTERFACE"
+ (pprIface new_iface)
+ -- Write the interface file
+ when (ghci_mode /= Interactive)
+ (writeIface (unJust "hscRecomp:hi" (ml_hi_file location))
+ new_iface)
+ return new_iface
+
+
+myParseModule dflags src_filename
+ = do -------------------------- Parser ----------------
+ showPass dflags "Parser"
+ -- _scc_ "Parser"
+
+ buf <- hGetStringBuffer True{-expand tabs-} src_filename
+
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
+
+ case parse buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ return Nothing };
+
+ POk _ (PModule rdr_module@(HsModule mod_name _ _ _ _ _ _)) -> do {
+
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module) ;
+
+ dumpIfSet_dyn dflags Opt_D_source_stats "Source Statistics"
+ (ppSourceStats False rdr_module) ;
+
+ return (Just rdr_module)
+ }}
- -- convert to Stg; needed for binders
- (stg_binds, cost_centre_info, top_level_ids)
- <- myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
- -- cook up a new ModDetails now we (finally) have all the bits
- let new_details = completeModDetails tc_env tidy_binds top_level_ids orphan_rules
+simplThenTidy dflags pcs hst this_mod is_exported binds rules
+ = do -- Do main Core-language transformations ---------
+ -- _scc_ "Core2Core"
+ (simplified, orphan_rules)
+ <- core2core dflags pcs hst is_exported binds rules
- -- and possibly create a new ModIface
- let maybe_final_iface = completeIface maybe_old_iface new_iface new_details
+ -- Do saturation and convert to A-normal form
+ -- NOTE: future passes cannot transform the syntax, only annotate it
+ saturated <- coreSatPgm dflags simplified
- -- do the rest of code generation/emission
- -- this is obviously nonsensical: FIX
- (unlinkeds, stub_h_filename, stub_c_filename)
- <- restOfCodeGeneration this_mod imported_modules cost_centre_info
- fe_binders local_tycons local_classes stg_binds
+ -- Do the final tidy-up
+ (pcs', tidy_binds, tidy_orphan_rules)
+ <- tidyCorePgm dflags this_mod pcs saturated orphan_rules
+
+ return (pcs', tidy_binds, tidy_orphan_rules)
- -- and the answer is ...
- return (HscOK new_details maybe_final_iface stub_h_filename stub_c_filename
- unlinkeds tc_pcs (unionBags rn_warns tc_warns))
+restOfCodeGeneration dflags toInterp this_mod imported_module_names cost_centre_info
+ foreign_stuff env_tc stg_binds tidy_binds
+ hit pit -- these last two for mapping ModNames to Modules
+ | toInterp
+ = do (ibinds,itbl_env)
+ <- stgBindsToInterpSyn dflags (map fst stg_binds)
+ local_tycons local_classes
+ return (Nothing, Nothing, Just (ibinds,itbl_env))
-restOfCodeGeneration this_mod imported_modules cost_centre_info
- fe_binders local_tycons local_classes stg_binds
+ | otherwise
= do -------------------------- Code generation -------------------------------
- show_pass "CodeGen"
-- _scc_ "CodeGen"
- abstractC <- codeGen this_mod imported_modules
+ abstractC <- codeGen dflags this_mod imported_modules
cost_centre_info fe_binders
- local_tycons local_classes stg_binds
+ local_tycons stg_binds
-------------------------- Code output -------------------------------
- show_pass "CodeOutput"
-- _scc_ "CodeOutput"
(maybe_stub_h_name, maybe_stub_c_name)
- <- codeOutput this_mod local_tycons local_classes
- occ_anal_tidy_binds stg_binds2
- c_code h_code abstractC ncg_uniqs
-
- -- this is obviously nonsensical: FIX
- return (maybe_stub_h_name, maybe_stub_c_name, [])
-
-
-dsThenSimplThenTidy dflags mod tc_result rule_base ds_uniqs
- = do -------------------------- Desugaring ----------------
- -- _scc_ "DeSugar"
- (desugared, rules, h_code, c_code, fe_binders)
- <- deSugar this_mod ds_uniqs tc_results
-
- -------------------------- Main Core-language transformations ----------------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules) <- core2core core_cmds desugared rules
-
- -- Do the final tidy-up
- (tidy_binds, tidy_orphan_rules)
- <- tidyCorePgm this_mod simplified orphan_rules
-
- return (tidy_binds, tidy_orphan_rules, fe_binders, h_code, c_code)
-
-
-
-myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
- = do let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds
-
- () <- coreBindsSize occ_anal_tidy_binds `seq` return ()
+ <- codeOutput dflags this_mod local_tycons
+ tidy_binds stg_binds
+ c_code h_code abstractC
+
+ return (maybe_stub_h_name, maybe_stub_c_name, Nothing)
+ where
+ local_tycons = typeEnvTyCons env_tc
+ local_classes = typeEnvClasses env_tc
+ imported_modules = map mod_name_to_Module imported_module_names
+ (h_code,c_code,fe_binders) = foreign_stuff
+
+ mod_name_to_Module :: ModuleName -> Module
+ mod_name_to_Module nm
+ = let str_mi = case lookupModuleEnvByName hit nm of
+ Just mi -> mi
+ Nothing -> case lookupModuleEnvByName pit nm of
+ Just mi -> mi
+ Nothing -> barf nm
+ in mi_module str_mi
+ barf nm = pprPanic "mod_name_to_Module: no hst or pst mapping for"
+ (ppr nm)
+
+
+myCoreToStg dflags this_mod tidy_binds
+ = do
+ () <- coreBindsSize tidy_binds `seq` return ()
-- TEMP: the above call zaps some space usage allocated by the
-- simplifier, which for reasons I don't understand, persists
-- thoroughout code generation
- show_pass "Core2Stg"
+ --let bcos = byteCodeGen tidy_binds
+ --putStrLn (showSDoc (vcat (map ppr bcos)))
+
-- _scc_ "Core2Stg"
- let stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
+ stg_binds <- coreToStg dflags this_mod tidy_binds
- show_pass "Stg2Stg"
-- _scc_ "Stg2Stg"
- (stg_binds2, cost_centre_info) <- stg2stg stg_cmds this_mod st_uniqs stg_binds
- let final_ids = collectFinalStgBinders (map fst stg_binds2)
-
- return (stg_binds2, cost_centre_info, final_ids)
-
-#if 0
--- BEGIN old stuff
- -------------------------- Reader ----------------
- show_pass "Parser" >>
- _scc_ "Parser"
-
- let src_filename -- name of the preprocessed source file
- = case ms_ppsource summary of
- Just (filename, fingerprint) -> filename
- Nothing -> pprPanic "hscMain:summary is not of a source module"
- (ppr summary)
-
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
-
- PFailed err -> return (HscErrs pcs (unitBag err) emptyBag)
-
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
-
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+ (stg_binds2, cost_centre_info) <- stg2stg dflags this_mod stg_binds
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+ return (stg_binds2, cost_centre_info)
+\end{code}
- -- UniqueSupplies for later use (these are the only lower case uniques)
- mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
- mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
- mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
- mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+%************************************************************************
+%* *
+\subsection{Compiling an expression}
+%* *
+%************************************************************************
- renameModule dflags finder pcs hst rdr_module
- >>= \ (pcs_rn, maybe_rn_stuff) ->
- case maybe_rn_stuff of {
- Nothing -> -- Hurrah! Renamer reckons that there's no need to
- -- go any further
- reportCompile mod_name "Compilation NOT required!" >>
- return ();
+\begin{code}
+#ifdef GHCI
+hscExpr
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> Module -- Context for compiling
+ -> String -- The expression
+ -> IO ( PersistentCompilerState,
+ Maybe (UnlinkedIExpr, PrintUnqualified, Type) )
+
+hscExpr dflags hst hit pcs0 this_module expr
+ = do {
+ maybe_parsed <- hscParseExpr dflags expr;
+ case maybe_parsed of
+ Nothing -> return (pcs0, Nothing)
+ Just parsed_expr -> do {
+
+ -- Rename it
+ (pcs1, maybe_renamed_expr) <-
+ renameExpr dflags hit hst pcs0 this_module parsed_expr;
+ case maybe_renamed_expr of
+ Nothing -> return (pcs1, Nothing)
+ Just (print_unqual, rn_expr) -> do {
+
+ -- Typecheck it
+ maybe_tc_return
+ <- typecheckExpr dflags pcs1 hst print_unqual this_module rn_expr;
+ case maybe_tc_return of {
+ Nothing -> return (pcs1, Nothing);
+ Just (pcs2, tc_expr, ty) -> do
+
+ -- if it isn't an IO-typed expression,
+ -- wrap "print" around it & recompile...
+ let { is_IO_type = case splitTyConApp_maybe ty of {
+ Just (tycon, _) -> getUnique tycon == ioTyConKey;
+ Nothing -> False }
+ };
+
+ if (not is_IO_type)
+ then do (new_pcs, maybe_stuff)
+ <- hscExpr dflags hst hit pcs2 this_module
+ ("print (" ++ expr ++ ")")
+ case maybe_stuff of
+ Nothing -> return (new_pcs, maybe_stuff)
+ Just (expr, _, _) ->
+ return (new_pcs, Just (expr, print_unqual, ty))
+ else do
+
+ -- Desugar it
+ ds_expr <- deSugarExpr dflags pcs2 hst this_module
+ print_unqual tc_expr;
- Just (this_mod, rn_mod,
- old_iface, new_iface,
- rn_name_supply, fixity_env,
- imported_modules) ->
- -- Oh well, we've got to recompile for real
-
-
- -------------------------- Typechecking ----------------
- show_pass "TypeCheck" >>
- _scc_ "TypeCheck"
- typecheckModule dflags mod pcs hst hit pit rn_mod
- -- tc_uniqs rn_name_supply
- -- fixity_env rn_mod
- >>= \ maybe_tc_stuff ->
- case maybe_tc_stuff of {
- Nothing -> ghcExit 1; -- Type checker failed
+ -- Simplify it
+ simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr;
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
+ -- Saturate it
+ sat_expr <- coreSatExpr dflags simpl_expr;
+ -- Convert to STG
+ let stg_expr = coreExprToStg sat_expr;
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
+ -- ToDo: need to do SRTs?
+ -- Convert to InterpSyn
+ unlinked_iexpr <- stgExprToInterpSyn dflags stg_expr;
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
+ return (pcs2, Just (unlinked_iexpr, print_unqual, ty));
+ }}}}
- -- Do the final tidy-up
- tidyCorePgm this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
+hscParseExpr :: DynFlags -> String -> IO (Maybe RdrNameHsExpr)
+hscParseExpr dflags str
+ = do -------------------------- Parser ----------------
+ showPass dflags "Parser"
+ -- _scc_ "Parser"
- -- Run the occurrence analyser one last time, so that
- -- dead binders get dead-binder info. This is exploited by
- -- code generators to avoid spitting out redundant bindings.
- -- The occurrence-zapping in Simplify.simplCaseBinder means
- -- that the Simplifier nukes useful dead-var stuff especially
- -- in case patterns.
- let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
+ buf <- stringToStringBuffer ("__expr " ++ str)
- coreBindsSize occ_anal_tidy_binds `seq`
--- TEMP: the above call zaps some space usage allocated by the
--- simplifier, which for reasons I don't understand, persists
--- thoroughout code generation
+ -- glaexts is True for now (because of the daft __expr at the front
+ -- of the string...)
+ let glaexts = 1#
+ --let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ -- | otherwise = 0#
+ case parse buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<no file>") 0 } of {
+ PFailed err -> do { freeStringBuffer buf;
+ hPutStrLn stderr (showSDoc err);
+ return Nothing };
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
-
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
-
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
-
-#else
- -------------------------- Interface file -------------------------------
- -- Dump instance decls and type signatures into the interface file
- _scc_ "Interface"
- let
- final_ids = collectFinalStgBinders (map fst stg_binds2)
- in
- writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids occ_anal_tidy_binds tidy_orphan_rules >>
-
-
- -------------------------- Code generation -------------------------------
- show_pass "CodeGen" >>
- _scc_ "CodeGen"
- codeGen this_mod imported_modules
- cost_centre_info
- fe_binders
- local_tycons local_classes
- stg_binds2 >>= \ abstractC ->
-
-
- -------------------------- Code output -------------------------------
- show_pass "CodeOutput" >>
- _scc_ "CodeOutput"
- codeOutput this_mod local_tycons local_classes
- occ_anal_tidy_binds stg_binds2
- c_code h_code abstractC
- ncg_uniqs >>
-
-
- -------------------------- Final report -------------------------------
- reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
+ POk _ (PExpr rdr_expr) -> do {
-#endif
-
-
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
--- END old stuff
+ --ToDo: can't free the string buffer until we've finished this
+ -- compilation sweep and all the identifiers have gone away.
+ --freeStringBuffer buf;
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_expr);
+ return (Just rdr_expr)
+ }}
#endif
\end{code}
-
%************************************************************************
%* *
\subsection{Initial persistent state}
\begin{code}
initPersistentCompilerState :: IO PersistentCompilerState
initPersistentCompilerState
-<<<<<<< HscMain.lhs
= do prs <- initPersistentRenamerState
return (
- PCS { pcs_PST = initPackageDetails,
+ PCS { pcs_PIT = emptyIfaceTable,
+ pcs_PTE = wiredInThingEnv,
pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleEnv,
- pcs_PRS = initPersistentRenamerState
+ pcs_rules = emptyRuleBase,
+ pcs_PRS = prs
}
)
-=======
- = PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = initRules,
- pcs_PRS = initPersistentRenamerState }
->>>>>>> 1.12
-
-initPackageDetails :: PackageSymbolTable
-initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings
initPersistentRenamerState :: IO PersistentRenamerState
= do ns <- mkSplitUniqSupply 'r'
return (
- PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = emptyNameEnv,
- prsInsts = emptyBag,
- prsRules = emptyBag,
- prsNS = ns
+ PRS { prsOrig = Orig { origNS = ns,
+ origNames = initOrigNames,
+ origIParam = emptyFM },
+ prsDecls = (emptyNameEnv, 0),
+ prsInsts = (emptyBag, 0),
+ prsRules = (emptyBag, 0)
}
)
initOrigNames :: FiniteMap (ModuleName,OccName) Name
-initOrigNames = grab knownKeyNames `plusFM` grab (map getName wiredInThings)
- where
- grab names = foldl add emptyFM names
- add env name = addToFM env (moduleName (nameModule name), nameOccName name) name
-
-
-initRules :: RuleEnv
-initRules = foldl add emptyVarEnv builtinRules
+initOrigNames
+ = grab knownKeyNames `plusFM` grab (map getName wiredInThings)
+ where
+ grab names = foldl add emptyFM names
+ add env name
+ = addToFM env (moduleName (nameModule name), nameOccName name) name
+
+
+initRules :: PackageRuleBase
+initRules = emptyRuleBase
+{- SHOULD BE (ish)
+ foldl add emptyVarEnv builtinRules
where
- add env (name,rule) = extendNameEnv_C add1 env name [rule]
- add1 rules _ = rule : rules
-\end{code}
-
-
-
-\begin{code}
-writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids tidy_binds tidy_orphan_rules
- =
- if isNothing opt_HiDir && isNothing opt_HiFile
- then return () -- not producing any .hi file
- else
-
- let
- hi_suf = case opt_HiSuf of { Nothing -> "hi"; Just suf -> suf }
- filename = case opt_HiFile of {
- Just f -> f;
- Nothing ->
- case opt_HiDir of {
- Just dir -> dir ++ '/':moduleUserString this_mod
- ++ '.':hi_suf;
- Nothing -> panic "writeIface"
- }}
- in
-
- do maybe_final_iface <- checkIface old_iface full_new_iface
- case maybe_final_iface of {
- Nothing -> when opt_D_dump_rn_trace $
- putStrLn "Interface file unchanged" ; -- No need to update .hi file
-
- Just final_iface ->
-
- do let mod_vers_unchanged = case old_iface of
- Just iface -> pi_vers iface == pi_vers final_iface
- Nothing -> False
- when (mod_vers_unchanged && opt_D_dump_rn_trace) $
- putStrLn "Module version unchanged, but usages differ; hence need new hi file"
-
- if_hdl <- openFile filename WriteMode
- printForIface if_hdl (pprIface final_iface)
- hClose if_hdl
- }
- where
- full_new_iface = completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Printing the interface}
-%* *
-%************************************************************************
-
-\begin{code}
-pprIface (ParsedIface { pi_mod = mod, pi_vers = mod_vers, pi_orphan = orphan,
- pi_usages = usages, pi_exports = exports,
- pi_fixity = (fix_vers, fixities),
- pi_insts = insts, pi_decls = decls,
- pi_rules = (rule_vers, rules), pi_deprecs = deprecs })
- = vcat [ ptext SLIT("__interface")
- <+> doubleQuotes (ptext opt_InPackage)
- <+> ppr mod <+> ppr mod_vers <+> pp_sub_vers
- <+> (if orphan then char '!' else empty)
- <+> int opt_HiVersion
- <+> ptext SLIT("where")
- , vcat (map pprExport exports)
- , vcat (map pprUsage usages)
- , pprFixities fixities
- , vcat [ppr i <+> semi | i <- insts]
- , vcat [ppr_vers v <+> ppr d <> semi | (v,d) <- decls]
- , pprRules rules
- , pprDeprecs deprecs
- ]
- where
- ppr_vers v | v == initialVersion = empty
- | otherwise = int v
- pp_sub_vers
- | fix_vers == initialVersion && rule_vers == initialVersion = empty
- | otherwise = brackets (ppr fix_vers <+> ppr rule_vers)
-\end{code}
-
-When printing export lists, we print like this:
- Avail f f
- AvailTC C [C, x, y] C(x,y)
- AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
-
-\begin{code}
-pprExport :: ExportItem -> SDoc
-pprExport (mod, items)
- = hsep [ ptext SLIT("__export "), ppr mod, hsep (map upp_avail items) ] <> semi
- where
- upp_avail :: RdrAvailInfo -> SDoc
- upp_avail (Avail name) = pprOccName name
- upp_avail (AvailTC name []) = empty
- upp_avail (AvailTC name ns) = hcat [pprOccName name, bang, upp_export ns']
- where
- bang | name `elem` ns = empty
- | otherwise = char '|'
- ns' = filter (/= name) ns
-
- upp_export [] = empty
- upp_export names = braces (hsep (map pprOccName names))
+ add env (name,rule)
+ = extendRuleBase env name rule
+-}
\end{code}
-
-
-\begin{code}
-pprUsage :: ImportVersion OccName -> SDoc
-pprUsage (m, has_orphans, is_boot, whats_imported)
- = hsep [ptext SLIT("import"), pprModuleName m,
- pp_orphan, pp_boot,
- upp_import_versions whats_imported
- ] <> semi
- where
- pp_orphan | has_orphans = char '!'
- | otherwise = empty
- pp_boot | is_boot = char '@'
- | otherwise = empty
-
- -- Importing the whole module is indicated by an empty list
- upp_import_versions NothingAtAll = empty
- upp_import_versions (Everything v) = dcolon <+> int v
- upp_import_versions (Specifically vm vf vr nvs)
- = dcolon <+> int vm <+> int vf <+> int vr <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
-\end{code}
-
-
-\begin{code}
-pprFixities [] = empty
-pprFixities fixes = hsep (map ppr fixes) <> semi
-
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")]
-
-pprDeprecs [] = empty
-pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")]
- where
- guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi
- | Deprecation ie txt _ <- deps ]
-\end{code}
-
-
projects / ghc-hetmet.git / blobdiff